ABAP Select data from SAP table BTXEMPT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BTXEMPT table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to BTXEMPT. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the BTXEMPT table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_BTXEMPT TYPE STANDARD TABLE OF BTXEMPT,
      WA_BTXEMPT TYPE BTXEMPT,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <BTXEMPT> TYPE BTXEMPT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BTXEMPT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BTXEMPT
  INTO TABLE IT_BTXEMPT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BTXEMPT
*  INTO TABLE @DATA(IT_BTXEMPT2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_BTXEMPT INDEX 1 INTO DATA(WA_BTXEMPT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BTXEMPT ASSIGNING <BTXEMPT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BTXEMPT>-EMPLOYEE = 1.
<BTXEMPT>-CHECKDATE = 1.
<BTXEMPT>-EMPNAME = 1.
<BTXEMPT>-COMPANY = 1.
<BTXEMPT>-GROUPCODE = 1.

ENDLOOP.

LOOP AT IT_BTXEMPT INTO WA_BTXEMPT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BTXEMPT-PAYTYPE, sy-vline,
  WA_BTXEMPT-PAYFREQ, sy-vline,
  WA_BTXEMPT-YTDPAYPER, sy-vline,
  WA_BTXEMPT-VACATION, sy-vline,
  WA_BTXEMPT-STDHOURS, sy-vline,
  WA_BTXEMPT-COTERM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BTXEMPT you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_BTXEMPT TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_BTXEMPT INTO WA_BTXEMPT.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_BTXEMPT_STR, 
EMPLOYEE TYPE STRING,
CHECKDATE TYPE STRING,
EMPNAME TYPE STRING,
COMPANY TYPE STRING,
GROUPCODE TYPE STRING,
PAYTYPE TYPE STRING,
PAYFREQ TYPE STRING,
YTDPAYPER TYPE STRING,
VACATION TYPE STRING,
STDHOURS TYPE STRING,
COTERM TYPE STRING,
NETWAGES TYPE STRING,
ESTGROSS TYPE STRING,
ESTSPOUSAL TYPE STRING,
GROSSUP TYPE STRING,
RECIPROCAL TYPE STRING,
GROSSWAGES TYPE STRING,
MAINTDATE TYPE STRING,
MAINTTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BTXEMPT_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_BTXEMPT_STR-EMPLOYEE sy-vline 
WA_BTXEMPT_STR-CHECKDATE sy-vline 
WA_BTXEMPT_STR-EMPNAME sy-vline 
WA_BTXEMPT_STR-COMPANY sy-vline 
WA_BTXEMPT_STR-GROUPCODE sy-vline 
WA_BTXEMPT_STR-PAYTYPE sy-vline 
WA_BTXEMPT_STR-PAYFREQ sy-vline 
WA_BTXEMPT_STR-YTDPAYPER sy-vline 
WA_BTXEMPT_STR-VACATION sy-vline 
WA_BTXEMPT_STR-STDHOURS sy-vline 
WA_BTXEMPT_STR-COTERM sy-vline 
WA_BTXEMPT_STR-NETWAGES sy-vline 
WA_BTXEMPT_STR-ESTGROSS sy-vline 
WA_BTXEMPT_STR-ESTSPOUSAL sy-vline 
WA_BTXEMPT_STR-GROSSUP sy-vline 
WA_BTXEMPT_STR-RECIPROCAL sy-vline 
WA_BTXEMPT_STR-GROSSWAGES sy-vline 
WA_BTXEMPT_STR-MAINTDATE sy-vline 
WA_BTXEMPT_STR-MAINTTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.